KR20100132476A - Method for producing compressed charcoal fuel using food waste - Google Patents

Abstract

The present invention, in the method of manufacturing charcoal fuel using food waste, after collecting the food waste, the dried food waste through the pre-treatment process anoxic and low temperature carbonization and then pulverized to obtain a carbonized powder, the carbonized powder with the adhesive After stirring and compression molding and drying to obtain a pressurized charcoal fuel, and if necessary, by adding the waste oil containing waste cooking oil to the dried press-molded charcoal to obtain a pressurized charcoal fuel, by using food waste It is possible to manufacture high-efficiency fuel charcoal that is eco-friendly and generates high heat, and it is possible to mass-process food waste that is poured out every day and to secure energy resources.

Description

Method for manufacturing compressed charcoal fuel using food waste {METHOD FOR MANUFACTURING COMPRESSED CHARCOAL USING FOOD WASTE}

The present invention relates to a method for recycling food waste, and more particularly, to a method for manufacturing high-efficiency fuel charcoal using environmentally friendly and high calorific value using food waste including negative waste water.

Food waste accounts for more than 30% of total household waste, and since 2005, the law has banned landfilling, and since 2013, sea dumping of effluents is also prohibited. In addition, various waste treatment methods are introduced by municipal governments to incinerate or recycle drinking wastewater, but methods that combine economical efficiency with mass treatment have not been developed yet.

It has been developed for the purpose of recycling food waste so far, with the aim of composting or dry feed, but the demand for salt is low due to high salt concentration.

Existing methods for fueling negative wastewater are described in Korean Patent Publication No. 2008-42060, "Method for Manufacturing Solid Fuel Using Food Waste," and Korean Patent Publication No. 2007-76557, "Sewage Sludge, Food Waste and Solid Fuel Using Flammable Waste." Manufacturing Method ", Korean Patent Publication No. 2006-96392" Method and Apparatus for Manufacturing Solid Fuel Using Food Waste and Synthetic Resin ", Korean Patent Publication No. 2005-91164" Method for Manufacturing Semi-Solid Fuel Using Waste ", Korean Patent Korean Patent Publication No. 2005-41616 "Method of Manufacturing Fuel Using Food Waste", Korean Patent Publication No. 2005-32057 "Production of charcoal raw material which is burned with necessary particles to transform food waste into charcoal which is fired in charcoal raw material Method ", Korean Patent Publication No. 2005-29164" Method of manufacturing fuel charcoal by burning charcoal raw material into food charcoal ", Korean Patent Publication No. 2005-14180 "Food Waste Solid Fuel Extrusion Apparatus", Korean Patent Publication No. 2005-1233 "Charcoal Manufacturing Method and Apparatus Using Food Waste", Korean Patent Registration No. 930055 "Solid Fuel Production Method Using Food Waste", Korean Patent Registration No. 512220 "Food Waste Solid Fuel Extrusion Apparatus", Korean Patent Registration No. 766137 "Powder Fuel Combustion Device Generated from Food Waste", Korean Patent Registration No. 636807 "Fuel Manufacturing Method Using Food Waste", Korea Patent Registration No. 527041 No. "Method and apparatus for manufacturing fuel using food waste", Korean Patent Registration No. 499893 "Method for manufacturing solid fuel using food waste", Korean Patent Registration No. 449517 "Food waste containing grains and vegetables, paper and plastic Recycling solid fuel manufacturing method including general waste and coal containing, "Korean Patent Registration No. 443899" Solid using food waste "Method of manufacturing materials" discloses the manufacture of solid fuels using combustible wastes such as waste synthetic resins, fossil fuels such as coal, coke and zeolites, and toxic chemicals as additives in the manufacture of solid fuels. Environmental pollution is inevitable, and waste synthetic resin treatment costs and additive costs are also required at high prices, which hinders its efficiency, and fueling the wastewater does not naturally result in large-scale treatment.

In addition, as a patent of the related arts related to charcoal manufacturing, Korean Patent Registration No. 729816 "Method of Manufacturing Solid Alternative Fuel and Garment Agent Using Food Waste", Korean Patent Registration No. 557471 "Charcoal Manufacturing Method and Apparatus Using Food Waste", Korea Patent registration No. 453878 "Charcoal manufacturing apparatus and method using food waste", Korea Patent Registration No. 418312 "Heating fuel production apparatus and method using food waste", etc. In the prior art, the charcoal simply by using food waste We focus only on making, and there is no concrete means to raise calorific value. Therefore, even if charcoal fuel is made, the low calorific value is disadvantageous in terms of economics, so there is less demand and there is a problem in mass processing.

On the other hand, even if food waste can be fueled in large quantities every day, if the fuel or recycled product is not suitable, the fuel will be piled up in inventory, and the cost of handling inventory will be doubled.

Therefore, the existing food waste fueling and recycling methods are not economical in terms of efficiency, so the supply and demand is not balanced. In addition, the amount of fuel to be produced per unit facility is already set to deal with the daily discharge of wastewater. However, since there are not many uses for wastewater fuel and recycling, a sufficient solution for treating large quantities of food waste is also desired.

Accordingly, an object of the present invention is to provide a method for producing high-efficiency charcoal fuel, which is environmentally friendly and high calorific value using food waste.

Another object of the present invention is to provide a method for producing a press-molded charcoal fuel that enables energy processing and mass processing using food waste.

According to the above object, the present invention, in the method of manufacturing charcoal fuel using food waste, after the food waste is collected and carbonized with one of low-temperature carbonization and mesophilic carbonization together with anoxic carbonization dried food waste through a pretreatment step To obtain a carbonized powder, the carbonized powder is stirred with an adhesive and then compressed and dried to obtain a press-molded charcoal fuel.

In addition, the present invention, in the method of manufacturing charcoal fuel using food waste, after collecting the food waste dried food waste through an anoxic and low temperature carbonization through a pretreatment step to obtain a carbonized powder, the carbonized powder and the adhesive After stirring together, compression molding and drying to obtain a compression molding char, characterized in that the compressed compression charcoal fuel is obtained by adding the waste oil containing waste cooking oil to the dried compression molding charcoal.

In addition, the oxygen-free carbonization and low-temperature carbonization in the present invention is characterized in that it is carried out using at least one of the closed external carbonization furnace and the electric carbonization furnace.

In addition, after the carbonization in the present invention, the grinding is made up to 4mm or less, the compression pressure during the compression molding is characterized in that 1kg / ㎠ ~ 30kg / ㎠.

In addition, in the present invention, the pretreatment process is characterized by having at least the step of dehydration, grinding, salt dilution, drying for the collected food waste.

In addition, the present invention is characterized in that after obtaining the carbonized product, the finely divided and finely divided foreign matters are filtered out and the carbonized material is stirred with the adhesive.

In another aspect, the present invention, in the method of manufacturing charcoal fuel using food waste, at least one waste of herbal waste, forest waste, waste wood, sawdust, livestock manure is mixed with food waste dried through a pre-treatment step after the collection of closed carbonization The process of charging into the furnace, carbonizing the injected mixture into one of low temperature carbonization and mesophilic carbonization together with anoxic carbonization in a closed carbonization furnace and pulverizing to obtain a carbonized powder, and stirring the carbonized powder with an adhesive It is characterized by consisting of the process of obtaining the compression molding char by compression molding and drying.

In addition, in preparing the charcoal fuel mixed with food waste and other waste, it is characterized in that it further has a process of obtaining a compression-molded charcoal fuel by adding the waste oil containing waste cooking oil to the dried compressed charcoal.

The present invention can produce high-efficiency fuel charcoal with environmentally friendly and high calorific value by using food waste, and can also bulk-process food waste poured out every day and secure energy resources.

1 is a view for explaining a process for producing a press-molded charcoal fuel according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, using the food waste to implement a high calorific value charcoal fuel. In other words, it is not simply a method for making charcoal, but a method for producing charcoal fuel more economically and efficiently by using food waste as a resource, and to make the charcoal fuel produced in the present invention have a high calorific value as follows. Find ways.

First, when carbonizing pretreated food waste, low temperature carbonization is performed instead of high temperature carbonization to increase calorific value.

Secondly, oxygen-free carbonization is performed instead of carbonization in the air to increase the calorific value.

Third, the food waste is low-temperature and oxygen-free carbonization, pulverized and compression molding to increase the calorific value. When low-temperature and oxygen-free carbonization and compression molding are carried out, the harmful gases remaining in the porous material escape due to low-temperature and oxygen-free carbonization, and carbides become denser due to compression molding, which increases the combustion time. do.

Fourthly, waste oil such as separated oil separated from waste cooking oil or negative waste water after carbide compression molding is penetrated into the compression molded carbide to further increase calorific value.

The above measures for countermeasures will be described in more detail.

General charcoal is classified into white coal and gum charcoal (black coal) according to the manufacturing method. Traditional Chinese method produces charcoal using charcoal kiln. On the other hand, most of the Chinese products are gum charcoal, and the charcoal is a product made by cooling down no harmful gas in the charcoal and is treated as lower grade than white charcoal. However, because gum can be collected more than white coal, it has a low price advantage. For example, burning 10 tons of oak [t] yields 500 to 600 kg of charcoal while 2500 to 3500 kg of gum charcoal. However, because the gum is not able to completely remove the harmful gas remaining in the pores in the manufacturing process during the manufacturing process, when the end consumer burns the gum in the house, the harmful gas remaining in the gum is ejected, which adversely affects the respiratory organ or the brain.

However, these gums are high in their carbon content and are well lit and have good instantaneous thermal power, making them suitable for fuels such as boilers. The method of producing gum charcoal is to carbonize wood in a charcoal kiln with a fire maintained at about 400-600 ° C., and then cool the charcoal kiln in a kiln for about 2 weeks while blocking the air hole (air hole) to produce charcoal.

In the present invention, food waste is used as a raw material, and a part of the production method of fired coal which is well-ignited and has good thermal power when producing compressed charcoal fuel is used. In other words, it utilizes the oxygen-free carbonization technique used in the production of gum coal. However, by different carbonization method and carbonization device, the production of charcoal is much higher than that of gum charcoal, and the ignition power and calorific value are increased.

In the present invention, rather than the carbonization method of the 400 ~ 600 ℃ temperature range used in the gum charcoal production method is preferably a low temperature carbonization method.

The low temperature carbonization method mentioned in the present invention is a method of carbonizing in a low temperature fire maintained at about 250 to 350 ° C., the medium temperature carbonization method is a method of carbonizing in a medium temperature fire maintained at about 400 to 500 ° C., and the high temperature carbonization method is 600 to 800. It means a method of carbonizing in a high temperature fire maintained at about ℃.

When carbonizing with low temperature carbonization, harmful emissions such as nitrous oxide (N ₂ O) are significantly reduced than with high temperature carbonization. More importantly, in low temperature carbides, the proportion of carbon in proportion to the calorific value is much higher than that of high and medium temperature carbides.

In the present invention, the low temperature carbonization method of 250 ~ 350 ℃ is preferably taken, but it should be understood that the medium temperature carbonization method (400 ~ 500 ℃) can be taken if necessary.

When carbonizing materials such as wood, the combustible content decreases as the carbonization temperature rises, but the calorific value per kg of fuel hardly decreases until the carbonization temperature is about 350 ° C., which is high as a fuel. This is because in the temperature range up to about 350 ° C., the rate of reduction of oxygen in the combustible components is small and the proportion of carbon which increases the calorific value is relatively high. As a relationship between the carbonization temperature and the calorific value obtained in the experiment, the calorific value in the low temperature carbonization is increased by about 4 times compared with the high temperature carbonization, and doubled by the medium temperature carbonization.

For the above reason, in the present invention, the emission of harmful gas is much lower than that of gum and the calorific value is preferably higher than that of mesophilic or high temperature carbonization.

In the present invention, the carbonization time is set to be longer than the general carbonization time (for example, about 60 minutes) during the production of charcoal for fuel so that almost no smell or harmful gas remaining in the charcoal can be removed. It may be. That is, the low temperature carbonization method and the relatively long carbonization time can sufficiently decompose the oil remaining inside the charcoal so that the smell of the charcoal fuel can be almost disappeared when the end consumer uses it.

Another way to remove the odor and charcoal in the charcoal is to take a medium temperature carbonization method of 400 ~ 500 ℃ even if the calorific value is slightly reduced.

At the same time as the low temperature carbonization method, the carbonization method having a relatively long carbonization time or using the medium temperature carbonization method may be made of charcoal fuel for cooking, cooking and cooking, which requires soot, odor, and little harmful gas. It is suitable for poetry.

In addition, in the present invention, a closed carbonization furnace, such as an external heat exchanger or an electric carbonization furnace, is used without utilizing the charcoal kiln used in the production of gum coal. One example of an external heat carbonization furnace usable in the present invention is an external heat kiln type carbonization furnace, and one example of an electric carbonization furnace is an electric furnace.

When the sealed carbonization furnace is used, since the inside of the furnace is sealed, it is possible to prevent dust from scattering, so that no additional cost such as using a dust collector having excellent dust removal capacity is required, and anoxic carbonization and Low temperature carbonization (250 ~ 350 ℃) is more than twice the production of charcoal than the existing gum charcoal, and produces a high-carbon charcoal fuel by anoxic carbonization to relatively increase the ignition power and calorific value.

In addition, even when the instantaneous heat is strong when burning a material, heat generated intensively in too short a time can not be secured because the time required for energy transfer is inevitably reduced. However, charcoal has a large specific surface area due to the presence of numerous pores, and the combustion speed is thus increased. Typical surface area of activated carbon is 3,500 m 2 / g.

Therefore, additional steel balls are required for using charcoal as a high calorific value fuel. In the present invention, the combustion time per unit volume is increased by increasing the density of the char by performing compression molding.

The compression pressure used in the carbide compression molding in the present invention is 1kg / ㎠ ~ 30kg / ㎠, more preferably 3kg / ㎠ ~ 20kg / ㎠.

In the present invention, even in compression molding of the carbide of the food waste raw material, its molding pressure is varied within the range of 1 kg / cm 2 to 30 kg / cm 2 depending on the end use.

In addition, it is preferable to pulverize the carbide in the carbonization furnace before compression molding for stable and high calorie quality compression molding.In order to make the carbide pulverization bond well during compression molding, an adhesive is added and stirred after crushing the carbide. Note action is preceded by compression molding. The pulverization of the carbide facilitates the compression molding as well as the effect of toxic gas remaining in the porous, and the adhesive used for stirring the carbonized powder with the adhesive is starch glue and an aqueous adhesive. Water-based adhesives do not emit harmful gases when using charcoal fuel.

In the compression molding of food waste carbide, fuel charcoal, which requires high calorific value, such as for factories or boilers, is used at low pressure within the compression molding pressure range of 1kg / ㎠ ~ 30kg / ㎠ (preferably 3kg / ㎠ ~ 20kg / ㎠). This is to make it easier to penetrate and absorb the waste oil such as waste cooking oil which is used as a way to further increase the calorific value into the compression molded carbide.

After the carbonized agitated mixture mixed with the aqueous adhesive is compression molded, the moisture content of the compressed molding charcoal is sufficiently dried to 10% or less, so that it can be packaged and shipped as a compressed charcoal fuel.

In addition, in order to further increase the calorific value, waste oil such as separated oil or waste cooking oil separated from the wastewater from food waste is infiltrated into the sufficiently compressed compressed charcoal. Compression-molded charcoal fuel penetrated waste cooking oil, etc. will increase the calorific value corresponding to the degree of oil absorption will increase the calorific value. In addition, compressed shaping charcoal fuel penetrated with waste cooking oil enhances the ignition power of charcoal and forms an oil film on the surface of charcoal particles, thus providing a moisture-proof effect, allowing the long-term storage of charcoal fuel.

Compression molding charcoal fuel containing waste oil such as waste cooking oil can be called "artificial coal" because it is stable and can produce high unit calories and can be used for thermal power generation, factories or boilers. Artificial coal has the advantage that there is little harmful gas which is generated by burning fossil fuel (petroleum or coal).

Now, the process of manufacturing the press-molded charcoal fuel according to an embodiment of the present invention will be described in more detail with reference to FIG. 1.

1 is a view for explaining a process for producing a press-molded charcoal fuel according to an embodiment of the present invention, the dotted box A block is a pretreatment process part of the manufacturing process of the press-molded charcoal fuel, the dotted box B block is pretreated After food waste is the main treatment process to make the compression shaping charcoal fuel of the present invention.

Referring to FIG. 1, various types of food waste collected by various catering companies or regions are subjected to storage and mixing in a storage cylinder having a mixer in order to have the ingredients as uniform as possible (step S10 of FIG. 1). The mixed negative waste water is transferred through a conveying conveyor or a conveying screw to perform first dehydration in a dehydrator (step S12), and then selects foreign substances in a primary sorter (step S14 of FIG. 1). It is preferable to provide one or more primary sorting machines, and sort out vinyl and plastics by hand, as well as the iron type that can be separated by magnetic force among foreign substances in food waste.

After performing the foreign matter screening, the food waste is crushed into a crushed piece of 10 mm or less in the first grinder (step S16 of FIG. 1) to facilitate desalination of the salt in the food waste, and then the food waste is put into the salt dilution tank. (Step S18 of Figure 1).

Into the salt dilution tank in which food waste is introduced, salt-free water, groundwater or industrial water is introduced to sufficiently dilute the salt concentration remaining in the food waste (step S18 of FIG. 1). At this time, the salt dilution water is effective for disinfecting food waste and dissolving oil to use hot water. Therefore, hot water may be directly injected into the salt dilution tank or the salt dilution tank may be heated, and hot steam may be injected into the salt dilution tank.

After satisfactorily diluting the salinity of food waste through the salt dilution tank, secondary dehydration is performed on the food waste using a centrifugal dehydrator (step S20 of FIG. 1), as well as negative wastewater generated by the second dehydration. In the pretreatment process, the wastewater produced by the primary dehydration of food waste is passed through the oil-water separator before the wastewater is cooled, and the oil component is separated from the water (step S22 of FIG. 1). Purification and water purification are carried out (step S24 of FIG. 1). The purified and purified water can be used as feed water for the salt dilution tank.

On the other hand, the food waste, which has been dehydrated by the secondary dehydrator, is dried and discharged by the primary dryer (step S26 of FIG. 1), thereby completing the pretreatment process for manufacturing the press-molded charcoal fuel.

Food wastes dried through the pretreatment process are commercialized as compressed charcoal fuel through this treatment process.

More specifically, the food waste finally dried through the pretreatment process is carbonized in a closed carbonization furnace as the first stage of the treatment process (step S28 of FIG. 1).

The closed carbonization furnace may be classified into a closed outer heat carbonization furnace 28a and a closed electric carbonization furnace 28b. In the present invention, two types of carbonization furnaces may be used together.

The sealed outer heat carbonization furnace 28a may use a press-molded charcoal fuel finally obtained in the present invention as the outer heat, and the closed electric carbonization furnace 28b carbonizes food waste at low temperature or medium temperature carbonization using electricity. As a result, food waste carbide is obtained.

In the operation of a closed carbonization furnace, low temperature or medium temperature carbonization under an oxygen-free environment due to the closure generates flammable gas due to incomplete combustion, and the carbonization furnace is subjected to expansion pressure. In the present invention, when the expansion pressure in the carbonization furnace reaches a certain level, the combustible gas is transferred to the primary dryer in the pretreatment process or the secondary dryer in the main treatment process through the moving gas conduit to provide heating energy of the primary or secondary dryer. It can be used or it can be used in external carbonization furnace. Since flammable gases generated in closed carbonization furnaces contain harmful components, the primary and secondary dryers must be subjected to high temperature treatment to remove them when used as energy.

In addition, in order to remove toxic gases or odors in food waste carbides, the carbonization time for low temperature carbonization (250 ~ 350 ℃) should be longer than the carbonization time (about 60 minutes) for general charcoal manufacturing. Another alternative is to mesophilic.

The food waste carbide carbonized in the carbonization furnace is subjected to secondary grinding in a secondary grinder at a pressure low enough to grind charcoal (step S30 of FIG. 1). The reason for the secondary crushing is to discharge a small amount of harmful gas remaining in the porous of charcoal to the outside due to low temperature anoxic carbonization to facilitate the compression molding at the same time.

It is preferable that the pulverization size of the carbonized pulverized product secondaryly pulverized by the secondary pulverizer is 4 mm or less, and after the secondary pulverization is performed by the secondary pulverizer, the carbonized pulverized product is fed to the secondary sorter. In the secondary sorting machine, secondary sorting is performed to filter out non-ferrous metals such as non-ferrous metals, which are not burned or crushed (step S32 of FIG. 1).

The carbonized powder passed through the secondary sorter is introduced into an adhesive stirrer, and the adhesive stirrer is sprayed with a water-soluble adhesive, and stirred after dissolving the water-soluble adhesive and the carbonized powder (step S34 of FIG. 1). The agitated carbide stirred in the adhesive stirrer is compression molded in a compression molding machine (step S36 of FIG. 1). Molding compression pressure in the compression molding machine is preferably controlled in the range of 1kg / cm 2 ~ 30kg / cm 2, more preferably in the range of 3kg / cm 2 ~ 20kg / cm 2.

The compression molded product in the compression molding machine is discharged as compression molding charcoal. The shape of the molding during compression molding may be variously molded into a shape suitable for the purpose of use, such as a briquette shape or a cylindrical hollow coal shape.

When performing compression molding in a compression molding machine, fuel charcoal requiring a high calorific value, such as for thermal power generation or for plant boilers, has a lower compression molding pressure than for baking or cooking. This is to add waste cooking oil as one of the ways to increase the calorific value of the fuel charcoal, in order to secure a space for the waste cooking oil is sufficiently penetrated and accommodated inside.

Compression molding char is molded in a compression molding machine is dried in a secondary dryer (step S38 of Figure 1), so that the moisture content of the compression molding charcoal is sufficiently dried below 10%.

When dried compressed molding charcoal is used for pottery use or cooking, it is shipped immediately without going through the waste cooking oil addition step of step S40 of FIG. 1 (step S42 of FIG. 1).

Compression molded charcoal for pottery use or cooking is made by low temperature carbonization to produce almost no smell or harmful gas, and its carbonization time is longer than that of ordinary carbonization or mesophilic carbonization. Therefore, the compressed shaping charcoal use or cooking charcoal plays a role of clean energy without any smell, noxious gas, or soot, even though waste oil such as waste cooking oil is not added and the calorific value is slightly reduced by low temperature long-term carbonization or medium temperature carbonization.

On the other hand, when the dried compressed molding charcoal is used for applications requiring high calorific value, such as for thermal power plants or plant boilers, the package is shipped after adding waste oil such as waste cooking oil or separated oil (step S40 in FIG. 1). (Step S42 of FIG. 1).

Fuel charcoal, which requires high calorific value, such as for factories and boilers, is a compression molding of carbide at a low pressure within the compression range of 1kg / cm 2 to 30kg / cm 2 (preferably 3kg / cm 2 to 20kg / cm 2). After drying, the waste oil, such as waste cooking oil, is penetrated into the press-molded charcoal, and the press-molded charcoal easily contains the waste oil and has more thermal power. In addition, the press-molded charcoal fuel, which is packaged for thermal power generation or factory boiler use, has high ignition power and has a moisture proof effect due to the oil film formed on the surface of charcoal particles, so that it can be stored for a long time.

It is preferable to pack the manufactured compressed molded charcoal fuel differently according to the use of thermal power plants, plant boilers, roasting and cooking, etc., and the above-mentioned pretreatment and main treatment processes are all made in a closed structure system. It is desirable to make it. In particular, the carbonization, pulverization, and compression molding steps of the treatment process should be implemented as a closed structure system, and pollution prevention measures against odors or dust should be provided.

Food waste recycling systems are already in operation in each municipality, and solid food waste in the form of pretreated dehydrated cakes can be easily obtained. In this case, if the solidified food waste in the form of cake is pulverized and the above-described treatment process is performed, the compression molding charcoal fuel of the present invention can be easily produced.

In the above description, the compression shaping charcoal fuel of the present invention has been described as an embodiment by using only food waste as a raw material.

In another embodiment of the present invention, agricultural wastes such as chaff and rice straw, corn husks, peanut shells, herbal and forest wastes, waste wood, sawdust and livestock manure, such as mixed with food waste or used independently without food waste compression molding charcoal You can make fuel. At this time, low temperature carbonization, anoxic carbonization, compression molding, and waste oil addition of pretreated mixed raw materials or their independent raw materials may be performed to make compressed molded charcoal fuel having a calorific value of 1,000 kcal / kg or more than conventional wood pellets. shall.

Charcoal varies from tree to tree, but prices range from 4 to 80,000 won per ton, ranging from ordinary wood to high-quality oak, with prices ranging from 4 to 80,000 won per ton. It is considered to be expensive fuel because it costs about 3 ~ 7,000 won. However, the press-molded charcoal fuel prepared according to the present invention is very cheap material purchase cost or transport cost only, and can also burn charcoal using the self-produced press-molded charcoal fuel, so the selling price per kg during mass production It is expected to be lowered to less than 300 won.

In the existing food waste treatment method, food waste is dried and recycled by manufacturing it as a RDF (Refuse Driven Fuel) .However, RDF made from food waste not only generates low heat, but also smells of the RDF itself and smoke and harmful gases during combustion. Due to the fact that it can not be used as a fuel in general, there is no small number of consumers, and eventually is not suitable for mass processing of food waste.

By the way, the compression-molded charcoal fuel of the present invention can be used anywhere in the home, including ordinary households, if the food waste is excellent in calorific value than dry RDF, and fuel is needed, it is cheap and free of pollution. In addition, if a large amount of food waste is made from compressed charcoal and used as fuel, it can reduce to less than 1/30 of the amount of food waste generated because only a small amount of ash remains due to complete combustion and can be disposed of without pollution. There is an advantage that can be processed.

Compression molding charcoal fuel prepared according to the present invention compared with other types of fuel, but the table for the calorific value is shown in Table 1 below.

Kinds Calorific value Waste Plastic (RDF) 8,200-9,000 kcal / kg Compression Molded Charcoal Fuel 4,000 ~ 6,000 kcal / kg Coal 6,000 kcal / kg Wood Pellets (RDF) 4,000 ~ 4,300 kcal / kg 19-hole briquette 4,250 kcal / kg Carbonized sludge 2,000 ~ 3,000kcal / kg

As can be seen from Table 1, the calorific value of the compression-molded charcoal fuel of the present invention is 4,000 ~ 6,000kcal / kg, it can be seen that the calorific value is much higher than the sludge carbide and comparable to 19-hole briquettes or coal.

Compression molding charcoal fuel of the present invention is charcoal, unlike briquettes or coal. Charcoal is about 80% carbon and the rest is composed of minerals (Ca, Na, Fe, Mg, K, P, etc.). In particular, the press-molded charcoal prepared from food waste as a raw material as described in the present invention has a relatively large amount of inorganic constituents, which are essential nutrients that are indispensable for biological maintenance than ordinary charcoal charcoal, and thus are highly effective in various fields.

For example, food waste raw material compression molding charcoal fuel may be used for cultivation of crops such as horticulture and vegetables, and for aquaculture, such as aquaculture or pig farming.

Charcoal has a very good soil improvement effect, so sprinkling 1kg of charcoal powder per 3.3㎡ of soil such as fruit farms and composting will increase the yield, improve taste and nutrition, and feed animal feed with 1% charcoal powder. It is said that consumption is reduced by 10%, grows well without disease, and reduces odor from manure. In addition, the meat quality is good, especially eggs do not deteriorate well after 100 days in summer.

In addition, when they are buried in the base or mixed with charcoal powder in fish feed, redness and green algae are eliminated and the taste of fish is similar to natural products.

Because charcoal can be easily made into powder form, it can be used inexpensively by supplying food waste raw material compressed molding charcoal fuel as powder even where it is needed as powder form, and as a result, it can be widely used for bulk processing of food waste. have.

In addition, since it is in the development stage to recycle it as a building material by using compression molding charcoal fuel or ash of food waste raw materials, it can be expected that the value of its use will increase and economic value will also increase.

In addition, charcoal is used for smelting to melt metals by melting ore because it is heated to a very high temperature by blowing fire and blowing air strongly. Moreover, the press-molded charcoal raw material of the present invention can be utilized for smelting by using together with coal or coke because its calorific value is superior to that of ordinary charcoal.

In the above description of the present invention, specific embodiments have been described, but various substitutions, modifications, changes, and modifications can be made without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

(S10)-Storage and Mixing Steps
(S12)-1st stage of dehydration
(S14)-1st screening stage
(S16)-1st grinding step
(S18)-salt dilution step
(S20)-2nd dehydration stage
(S22)-oil separation stage
(S24)-Purification and Water Purification
(S26)-1st drying step
(S28)-carbonization stage
(S30)-2nd grinding step
(S32)-2nd sorting stage
(S34)-Glue stirring step
(S36)-Compression Molding Step
(S38)-2nd drying step
(S40)-Waste Cooking Oil Addition Step
(S42)-Shipping stage

Claims (8)

In the method of manufacturing charcoal fuel using food waste,
After collecting the food waste, carbonize the dried food waste through the pretreatment process with one of low temperature carbonization and middle temperature carbonization with anoxic carbonization and then pulverize it to obtain a carbonized powder. Method for producing compressed charcoal fuel using food waste, characterized in that to obtain a compression molded charcoal fuel by drying.
In the method of manufacturing charcoal fuel using food waste,
After collecting the food waste, the dried food waste is carbonized by anoxic and low-temperature carbonization through pretreatment process, and then pulverized to obtain a carbonized powder. The carbonized powder is stirred with an adhesive, compressed and dried to obtain a press-molded charcoal, and dried. Method for producing compressed charcoal fuel using food waste, characterized in that to obtain a press-molded charcoal fuel by adding the waste oil containing waste cooking oil to the compressed press-molded charcoal.
The method of claim 1, wherein the carbonization is performed using at least one of a closed external carbonization furnace and an electric carbonization furnace.
The method of claim 1 or 2, wherein after the carbonization is pulverized to less than 4mm, the compression pressure during compression molding method of manufacturing charcoal fuel using food waste, characterized in that 1kg / ㎠ ~ 30kg / ㎠.
The method of claim 1 or 2, wherein the pretreatment process comprises at least the steps of dehydration, grinding, salt dilution, and drying of the collected food waste.
The method of claim 1 or 2, wherein after obtaining the carbonized powder, fine-grained and pulverized foreign matter is filtered out, and the carbonized powder is stirred with an adhesive.
In the method of manufacturing charcoal fuel using food waste,
A process in which at least one waste of herbaceous waste, forest waste, waste wood, sawdust, and livestock manure is collected and mixed with dried food waste through a pretreatment process and put into a closed carbonization furnace;
Carbonizing the injected mixture with one of low temperature carbonization and mesophilic carbonization together with anoxic carbonization in a closed carbonization furnace and grinding to obtain a carbonized powder;
Method for producing compressed charcoal fuel using food waste, characterized in that the carbonized product is stirred with an adhesive, and then compressed and dried to obtain compressed molded charcoal.
8. The method of claim 7, further comprising a process of obtaining compressed charcoal fuel by infiltrating the dried compressed charcoal by adding waste oil including waste cooking oil to the dried compressed charcoal.

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